Lock and latch mechanism.



No. 837,360. v PATEN'I'ED DEC. 4,.'1906,

H. G. VOIGHT.

LUCK AND LATCH MEGHANISM.

APPLIATION FILED HAR.28. 1906.

2 SHEETS-SHEET 1.

f me.

I PATENTED DEG. 4, 1906. H. Gra VOIGH'Il LCK AND LATCH MECHANISM.

- APPLICATION FILED MAJLZS. 1906.

2 SEETS-SHEET 2, E Z 9..

Parana onnion.

UNITED STATES CONNECTICUT, ASSIGNOR TO COMPANY, OF NEW BRITAIN,

CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK AND LATCH MECHANISM.

No. 837,360. y

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed March 28, 1906. Serial No. 308,406.

To @ZZ whom, it may conce/'n.-

Be it known that I, HENRY G. VoiGHT, a citizen of the United States,residing at New Britain, county of Hartford, Connecticut, have inventedcertain new and useful Iniprovements in Lock and Latch Mechanism, ofwhich the following is a full, clear, and eX- act description.

My invention relates to improvements in lock and latch mechanism.

The main object of the invention is to provide a guard or safety devicefor the nightlatch or stop-action mechanism to prevent tampering withthe same when'the door is closed and locked.

In my former application, Serial No. 305,7 57, I have shown a safetydevice for the night-latch mechanism of a mortiSe-lock. My presentinvention is directed more to the type of mechanism shown in my formerpatent, No. 790,936, of May 30, 1905. In addition to the safety device Ihave shown an improvement in this latter type of lock which preventsinjury to the parts when the lock is being attached to the door.

The invention in its preferred form will be found illustrated in theaccompanying two sheets of drawings.

Figure 1 is a horizontal section andV plan view of mechanism-embodyingthe improvements of my invention, the parts being in the position inwhich the night-latch is on Fig. 2 is a front view of the mechanism.Fig. 3 is a view of the inner side of the outer side plate with attachedparts. Fig. 4 is a view of the inner side of the inner side plate withattached parts. Fig. 5 is a fragmentary view showing the under side of asafety device or guard. Figs. 6 and 7 are detail views of a device forpreventing injury to the mechanism when it is being attached toa door.

The plates 1 and 2 are adapted to the opposite sides of a door and carrythe knobs 3 and L1, respectively. The alinement of the plates is securedby the pins 5 and 6, which telescope in sockets in the outer side plate,and the plates may be drawn together or clamped against the sides ofthev door by means of screws, such as 7. The outer side plate has anextension 8, forming an end plate, through which the pivoted bolt 9 isadapted to protrude.

'10 is the latch-slide, carried by the outer side plate and connected tothe latch-holt in any suitable manner. ia :3,-: 11 is a 4spindle whichrotates with?` the knob 3 and the cylinder-lock in the outer knob, whichpermits of a limited rotation relative thereto.

12 is a roll-back mounted on the spindle and operatively connected withthe latchslide, so that the latch-bolt may be retracted by rotation ofthe inner knob or by a key 1n the outer knob.

13 is a roll-back carried by the outer knobshank and operativelyconnected with the latch-slide, so that normally the slide may beretracted by the rotation of the outer knob.

14 is a dogging-slide, havingl a notch into which a projection of therol -back 13 eX- tends when the parts are in the position shown in thedrawings.

15 is an operating member pivoted to the end plate S and connected tothe cloggingslide 14 by means of a pivoted arm 16.

which consists of the parts 14, 15, and 16, are more 'fully described inmy Patent No. 790,936, before referred to.

lVhen the parts are in the position shown in the drawings, the outerknob is dogged or blocked; but the bolt -may be retracted by operationof a key in the'outer knob, which retracts the slide through the mediumof the spindle 11 and roll-back 12. It is possible in some instancestoinsert an instrument at the the night-latch mechanism from on to offposition, so that the latch-bolt may be retracted by the ordinaryrotation of the outer knob without the use of a key. To prevent this, Iprovide a safety device or guard. (Shown particularly in Figs. 1, 4, and5.) 17-is a dog'adapted to be moved back of one arm of the operatingmember 15 of the night-latch mechanism. 1S is aplate affording a supportfor the dog 17. 19 is a s ring which holds t e stop 20. 21 is a lug orthe inner side plate and to W 'ch the operating-plate 18 is pivoted at25. 22 is a spring which holds the operating-plate 18 in its position asshown in the drawings. When the ost carried by mechanism is attached toa door, the door is The details of the night-latch mechanism,

edge of the door and change the position of the dog normally against hasa connection with the plug of v Olpen, and the night-latch on, the partsare in t e 1position shown in Fig. 1. When the door is c osed, theoperating member 18 contacts with the strike-plate or with the edge ofthe door-casing and is swung on its pivot so as to bring the dog 17 inthe rear of the right-hand arm of the operating member 15 of thenightlatch mechanism. This prevents the nightlatch mechanism from beingthrown to off position so long as the door remains closed. en the dooris opened, the spring 22 throws the operating member 18 back intotheposition shown in full lines in the drawings, so that the dog 17 isthrown out of its sto ping position. When the night-latch is o the righthand arm of course stands in the way of the dog 17. The dog, however,being yieldingly mounted, simply strikes against the arm of thenight-latch operator 15 when the door is closed, the safety-operator 18swinging into its usual position when the door is closed withoutinjuring the parts.

This type of mechanism is adapted to be attached to a door by sawing anotch in the edge to allow for the bolt and connections between theplates and then bore holes through the door for the spindle and theclampingscrews.

23 is a guard-plate connected to the lower edge of the end plate 8 bymeans of a screw passing through the shank 24. This guardplate extendsinward to such a point that when the mechanism it being applied to thedoor the guard will strike the rear end of the notch and prevent anyinjury to the mechan- 1sm.

What I claim is` 1. In a lock and latch mechanism, side plates adaptedto the opposite sides of a door, a bolt and night-latch mechanismcarried by one side plate, and a safety device for the night-latchmechanism carried by the opposite side plate.

2. In a lock and latch mechanism, a bolt, a night-latch mechanismincluding a pivoted operator, and a safety device for the nightlatchmechanism including a pivoted dog.

3. In a lock and latch mechanism, a pair of side plates, knobs carriedthereby, 'a bolt carried by one side plate, operative means ofconnection between said knobs and said bolt,

a night-latch mechanism, a safety device therefor including an operatingmember adapted to project laterally from one side of the mechanism.

4. In a lock and latch mechanism, a pair of side plates, knobs carriedthereby, a bolt, operative means of connection between said knobs andsaid bolt, a night-latch mechanism,

and a safety device for preventing the operation of the night-latchmechanism'A when the door to which the mechanism is attached is closed.

5. In a lock and latch mechanism, a pair of side plates adjustable toand from each other, a bolt, operating means therefor, night-latchmechanism carried by one side plate, and a safety other side plate forpreventing the operation of the night-latch mechanism when the door towhich the mechanism is attached is closed. 6. In a lock and latchmechanism, a bolt, means for retracting said bolt, night-latch mechanismfor dogging said retracting means including an operating member pivotedon a vertical axis, and a safety device for said night-latch mechanismincluding an operating member pivoted on a vertical aXis. 7. In a lockand latch mechanism, a bolt, means'for retracting said bolt,night-latch,mechanism for dogging said retracting device carried by the means, anda safety device for preventing the operation of the night-latchmechanism including an operating member and a springpressed dog carriedthereby.

8. In a lock and latch mechanism, a bolt, means for retracting saidbolt, night-latch mechanism for dogging said retracting means, and asafety device for preventing the operation of the night-latch mechanismincluding a pivoted operating member and a dog yiel-dingly mountedthereon.

9. In a lock and latch mechanism, a bolt, means for retracting saidbolt, night-latch mechanism for dogging the retraction of said bolt, anda safety device for said night-latch mechanism including an operatingmember projecting laterally from one side of said mechanism.

10. In a lock and latch mechanism, a pair of side plates, a bolt carriedby one side plate, means for retracting said bolt, night-latch mechanismtherefor and a safety device for preventing operation of saidnight-latch mechanism.

11. In a lock and latch mechanism, a pair of side plates adjustable toand from each other, one of said side plates having an eX- tensionforming an end plate, a latch-bolt protruding through said end plate,means for retracting said latch-bolt, night-latch mechanism for doggingthe retraction, and a safety device for said night-latch mechanismincluding an operating member projecting from one side of said mechanismin the rear of said end plate.

HENRY G. VOIGHT.

Witnesses:

M. S. WIARD, W. R. STONE.

IOO

